在季节性温度变化下的集成固定膜激活污泥-anammox系统中,有效地去除和使用基质
Juntong Hu1, Jianfang Wang2, Xingran Li3
1School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, PR China.
Bioresource technology
|October 31, 2023
概括
集成的固定膜激活污泥 (IFAS) 系统可以增强去除,特别是在低温下. 在IFAS系统中的Anammox细菌表现稳定,活性更高,在废水处理中有效.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 废水处理工程 废水处理工程
背景情况:
- 季节性温度变化挑战了废水处理中的去除.
- 集成的固定膜活性污泥 (IFAS) 系统提供了提高性能的潜力.
- 了解不同温度下IFAS中anammox细菌的作用至关重要.
研究的目的:
- 在季节性温度波动下调查IFAS系统的除效率.
- 评估IFAS系统的冲击反应和低温适应性.
- 为了确定anammox细菌对IFAS中去除的贡献.
主要方法:
- 两个推流反应堆的比较:一个带有载体 (IFAS),一个没有 (控制).
- 在相同的条件下运行,以隔离载体的影响.
- 应用Haldane模型来评估特定的anammox活动.
- 微生物社区结构的分析,专注于主导物种.
主要成果:
- 国际金融风险投资体系 (IFAS) 系统表现出优异的冲击反应和低温适应能力.
- 在IFAS中的去除率在8-12°C时从0.37-0.53kg-N(m3·d) -1不等.
- 载体上的Anammox细菌保持了稳定的去除贡献率 (55%),并在13°C时表现出28-49%的高特异活性.
- 在IFAS中,Candidatus Jettenia是占主导地位的物种 (45%的丰度),有利于载体附着.
结论:
- IFAS系统显著提高了除性能,特别是在低温下.
- 在载体上固定的Anammox细菌是IFAS系统稳定性和效率的关键.
- 该研究提供了一个可行的战略,用于在废水处理中实施anammox工艺.
相关概念视频
01:15Metabolism of Chemolithotrophs
21
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
21
01:22Inorganic Nitrogen Assimilation
22
Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
22